Letters related to and biographies of William Addington Martindale and his son, William Clinton Martindale, and their families from approximately 1840-1911. The documents contain Martindale family correspondence from various states, and letters primarily from Utah about the settlement and establishment of The Church of Jesus Christ of Latter-day Saints in the West.

The collection consists of photocopies of the original materials documenting the history of Duncan's Retreat, Utah, biographical information on William Addington Martindale, journal entries from William Martindale, and photographs. The folders are contained in one box.

Typescript copies of correspondence, blessings, a biographical sketch, genealogy, a letter of recommendation, letters to Martindale from James Martindale (1856) and from Orson Hyde (1848), genealogical record of the Martindale family, a photograph of Martindale, and Martindale's patriarchal blessing by Hyrum Smith (1843) (some photocopies). Also includes TLS's from the donors.